This Aristo Scholar Slide Rule No. 0903 is a must-have for collectors and enthusiasts of slide rules. Made in Germany, this slide rule comes with its original box case and is a great addition to any collection. Its precision and quality are unmatched, making it a valuable tool for engineering and science students. The slide rule is perfect for those interested in collecting slide rules, and its history is sure to spark a conversation. Its unique design and functionality make it an excellent conversation starter, and its rarity only add to its appeal. Add this Aristo Scholar Slide Rule No. 0903 to your collection today and experience the joy of owning a piece of history.